AC, you have done an excellent job of keeping the road home paved and smooth.
Please remember there are several different outcomes of your situation. Yes, there is the possibility of your W disappearing out of your life forever. However, that's only one scenario. There's the other possibility your W will take the time to heal, she returns, and has the energy to put into R, and you end up in better place than you've ever been before. There's a plethora of scenario in between the two.
We have the freedom to choice the positives and the negatives out of anything that happens in our lives. Since we have that freedom to choose, we might as well excercise and choose the positives.
Telemark's right. It will get better over time for you. I hate saying that as much as I hate hearing it. It sounds so cliche, but it's ture.
Embrace your situation. Enjoy the freedom of coming and going. Work hard on your GAL. Spend time in the company of other people. I know that's been paramount for me.
Hang in there, man. Know that I'm amongst those thinking about you and praying for you.